* General Thistle: "கொடுக்காய்" (kodukkay) is a general term for thistles in Tamil.
* Scotch Thistle: "சீத்தா" (seetha) or "சீத்தா காய்க்குடி" (seetha kaykkudi) refers specifically to the Scotch Thistle.
It's important to note that there are various types of thistles, and some might have specific regional names in Tamil.